Windshield-cleaner motor



Oct. 7, 1930. v A. L. JUST 1,777,799

v WINDSHIELD CLEANER MQTOR Filed Aprii 5, 1922 2 Sheets-Sheet 1 PatentedOct. 1930- I UNITED STATES PATENT OFFICE ALVAH L. JUs'r, or SYRACUSE,NEW YORK, ASSIGNOR 'ro TRiCO rnonuors CORPORA- TION, or BUFFALO, NEWYORK wINDsHI'ELn-cLEANEn MOTOR Application filed April 3,

I This invention relates to improvements in. windshield cleaners. andhas for its object to provide a novel and simple device of the class,which may be operated by either fluid pres- 5 sure, or by the suction ofthe ordinary internal combustion engines employed for propelling motorvehicles. A further object is to provide novel and simple means forstarting. stopping, and for controlling the speed of the cleaningmember, and a further object is to provide novel and simple means foradmitting atmospheric pressure to one end of the actuating cylinder,while the suction is being applied to the opposite end of the cylinder.

- I attain these objects by the means set forth in the detaileddescription which follows and as illustrated by the accompanyingdrawings, in which- 0 Figure 1 is a rear side elevation of the completedevice applied to the Windshield of an automobile. Fig. 2 is an endelevation ofthe same. Fig. 3 is a top plan view of the complete device.Fig. 4.is a front side 5 elevation of the same.- Fig. 5 is a centralvertical longitudinal section, taken on line 5-5 of Fig. 2. Fig. 6 is avertical longitudi-- nal section, taken on line 66 of Fig. 7. Fig. 7 isa vertical cross-section taken on line 7'7 0 of Fig. 6. Fig. 8 is a broen rear face view of the bracket which supports the cylinders and thevalve. Fig. 9 is a similar view with the valve removed. Fig. 10; is arear face view of the valve. Figs. 11 and 12 are de-' tached views ofthe connected pistons. And Fig. .13 is an enlarged view, showing thedisc valve and its actuating parts.

In the drawings 2 representsthe trans.

parent part of an ordinary windshield, and

2 is the top rail of its frame.

My improved cleaner consists of the fol lowing parts 3 represents aframe or body, which supports all of the cleaner parts and which ispreferably made of any sultable metal; From the opposite sides of thebody 3 extend similar integral arms 3, both of which are perforated forattachment to the rail 2'. by screws or bolts 2 l'represents a casingorcylinder, whose ends are preferably tightly closed by caps 4.

shown), and the cleaner.

1922. Serial No. 549,173. 7

At one side of the cylinder the wall is cut away, to provide acircumferential opening 4 a' portion of the metal at the top and bottomof said opening being bent outwardly, to form lugs or cars 4",which areperforated. In this opening 4 is inserted the rear end of the main body3, as best seen in Fig. 7, and these parts are then detachablysecured'together, by means of screws 4, which pass through theperforations in the ears 4", and

are threaded into the top and bottomfaces of p the body 3. Within thecylinder 4 are disposed similar spaced pistons 5 5, which comprise outerdisks 5, cup-shaped members 5", of any pliant material, and inner disks5, all of which are held in place by bolts '5. The pistons are suitablyspaced and connected for movement, as one part, by means of asubstantially flat sheet-metal spacer 6,

as bestseen in Figs. 5'; Hand 12. The opposite ends of the spacer 6 areprovided with to hold the pistons, as well as the spacer, from rotationinthe cylinder. The cylinder 4;, in the present case, is stationary, andonly the pistons, the cleaning membenand the valve and its operatingparts move. The pistons 55' are-preferably operated by the suctionproduced by the engine pistons, and for this purpose a pipe 7 forms thecommunication between any suitable'part of the'engine (not This pipe 7connects directly with the main body 3, which is bored out of 7 toreceive one end of the said pipe. The port? connects with an angularpassage 7*, which terminates at an exhaust port? in the rear face of thebody 3 constituting a valve seat, as shown in Figs. 6, 7, 8

. and 9. The passage or duct 7 connects with a threaded opening. 8,which is normally closed by a needle-valve '8, the inner end of i whichcontrols the passage 7* (see Fig. 7

and therefore the starting and stopping, as well as the various speedsat which the cleaning member may be operated. The exhaust port 7 b iscontrolled by a disk-shaped rotary valve 9, which is pivoted preferablyon a pivot post 9 the latter being anchored in the body 3. The disk 9 isheld resiliently and from accidentalmovement, against the face of thebody 3, by a spring 9, and a washer 9", carried by said post. The valve9 has a limited rotary movement by means of a peripheral cutout 9providing spaced parts or shoulders, andby a stop-pin or stop-post 9which is also rigid to the body 3 (see Figs. 5, 6, 7 and 8). Theopposite edge of the valve 9 is also provided with a similar cutout 9providing spaced parts or shoulders, which receives the arm 10 of aninverted L-shaped lever 10, which is pivoted on the post 9 and serves asthe actuator for the valve 9, the arm 10' contacting with said spacedparts or shoulders on the disk. The lever 10 extends downwardly (seeFig. 7) parallel to the valve and the body 3, and its lower end isformed into a hook 1O at the opposite side of the pivot point of thevalve disk, to which a tension spring 10 connects. The upper end of thespring 10 is connected to the corresponding end of a lever 11, mountedrigidly on a shaft 12, which is journalled in the top portion of thebody 3. The lever 11 is swungby the movement of the pistons preferablyin the folowing manner: The lower free end of the lever 11 is providedwith a stud or pin 11', which is disposed and plays in the slot 6 of thespacer 6. .By this construction and arrangement, the reciprocatorymovements of the pistons and spacer, as shown by the full and dottedlines in Fi 5, rocks the lever 11 (and also the shaft 12%,. back andforth past the valve 9, as shown by the full and dotted lines in Figs. 5and 6. 12" re resents the cleaning member, which is rigi 1y mounted onthe outer end of the shaft 12, which projects through the rail 2, andconsists of a rod or arm 12, and the cleaning element proper 12". Theelement 12 is preferably pivotally mounted in a holder 12 by a in 12which allows said part to readily a just itself to the outer surfae ofthe windshield.- The holder 12 is preferably rigid on the'free end ofthe rod 12. 1

To operate the pistons 5-5 by the suction of the engine, as described, Iprovide two similar tubes 13-13', which extend in opposite directionsfrom the body 3,. along the outer front side of the cylinder 4, as shownin Figs. 2, 3, 4, 8 and 9. The corresponding ends of the tubes 1313 areinserted in openings 1313? at the opposite sides of the body 3, andcommunicate with combined inlet and exhaust ports -13 .13 which aredisposed at the opposite sides of the main exhaust or suction port 7'.The opposite or outer end-portions of thetubes13--13' are bent, and

the ends thereof are inserted in perforations 4 which are disposed closeto the caps 4, and just beyond the extreme travel of the pistons. Inorder to connect the ports 7 and 1313 for communicating the'suction tothe opposite ends of cylinder 4, the valve 9 is provided in its bottomface, (see Fig. 10) with a grooved passage or blind recess 9. The groove9 is so positioned and proportioned that, when the valve 9' is rotatedin opposite directions by the lever 10 (see Figs. 5 and 6), a freepassage is effected between the port 7 and the ports 1313 as the casemay be. In order to prevent the establishment of a vacuum in one end ofthe cylinder,

while the pistons are being drawn towards.

the opposite end, the valve 9 is provided with two perforations '9 and9*, which are disposed a certain distance beyond the opposite ends ofthegroove 9. By this arrangement when the valve 9 is rocked towards theright, the perforation 9 is brought into register with the port 13",which admits atmosphere through the said ports 9", 13 and tube 13 intothe left hand end of the cylinder into the tube 13, and when the valveis rocked toward the left, the perforation 9 (see Fig. 8) is broughtinto register with the port 13, which admits the atmosphere through thesaid ports to the tube 13' and thus to the.right hand end of thecylinder. The oscillatory movements of the cleaning member 12' iseffected by the rocking to and fro of the lever 11 through thereciprocatory action of the spacer 6 and the pistons 55, and themovements of these parts always correspond, since they are both rigid onthe shaft 12. The timin of the strokes-,of the cleaner 12 may be eIected by the manipulation of the needle valve 8, by

which the unscrewing of the said valve speeds up the cleaner 12, whilethe inward screwing of said valve slows d wn the cleaner, or stops itsoperation entirely. The forward and backwardmovements of the lever 11have no direct ac'tion on the valve 9, there being no connection betweenthese parts except through the spring 10". The valve 9 is operateddirectly by-the lever 10, through its arm 10', which plays in the.cutout 9, as de scribed. The operation of valve 9, is as follows:Assuming that the pistons 5-5 are positioned at the left endof thecylinder 4, as shown by the dot-ted lines in Fi 5, and that the suctionis applied to the right. end of the cylinder, by means of the tube 13,the pistons are then drawn towards the right until they reach the fullline position, shown in Fig. 6, and the corresponding position, shown bydotted lines in Fig. 5. This movement of the pistons, through the spacer6, which is always in engagement with the lever 11, swings said leverfrom the position shown at a in Fig. 5, to that shown at b, in Figs. 5,6

movement of the lever 11, the valve 9 and its actuating lever '10 remainstationary, as shown by the dotted position 0, in Figs. 5, 6 and 13,until the lug or spur 8 carried by the spacer 6, engages and swings thelever 10 towards the right. The spur 6 (as well asthc spur 6 is arrangedto come to a stop beneath the center of the valve 9 (see dotted lines inFigs. 6 and 13). By the time the spur 6 comes to said stop, asdescribed, the lever 10 is moved past the center of the valve, and thespring 10", whose tension has been increased by the completion of thestroke ofthe lever 11,fjerks the lever 10 towards the right,

as shown by the full lines in Fig. 6. ,This last quick movement of thelever 10, shifts its arm 10 from its engagement with the righthand endof the cutout-9 to the opposite end of said cutout (see dottedlines inFig. 6),

after which said arm rotates the valve, to the extent shown by the-fulllines in Figsj 6 and 13. This positions the groove!)forestablishingfcommunication between the port 7 and the port 13,whichshifts the suction from the pipe '13 to the pipe 13 and effects thereturn movement of the pistons towards the left, and so on; By thusdelaying the action of the'valve 9, the atmospheric communication withthe opposite ends of the cylinder is maintained practically throughoutthe full power stroke of the pistons, which greatly reduces theresistance, as well as the wear and tear upon the operating parts, andincidently,

' the said provision tends to greatly increase entirely automatic in itsaction from the time- 'the needle valve 8 is opened until it is closed.The device is simple, compact and light, and

ders'toodthat the suction of the 1- the power of the strokes of thecleaner 12,

which is avaluable feature, when it is un- I gine that is available foroperating the windshield cleaner is not, as a rule, very strong,particularly nearly so. v a The device herein shown and described is canbe produced at relatively small cost, and when properly constructed andinstalled needs no attention nor care except as here in above explained.

Having thus described myrinvention what I claim, 1s.- 1 v '1. A valveconstruction for fluid motors, comprising a body having a valve seat, a

valve disk in contact with said seat, a pivot" post on said bodypivotally mounting the disk to oscillate to and from two operativepositions on said seat, a stop postmounted on the body and coacting withthe disk for limiting its oscillatory movement, a lever pivoted on oneof-said posts and-having an end engaging a-portion of said disk at oneside of the pivot of said disk and having another end extending to theopposite side of said pivot, a second "lever pivoted on said body toswing one of its ends from one side whe'nthe throttle is wide open oroi-the pivot of said disk. to the other side of the pivot of said disk,a spring connector between the extending end of said first lever andsaid second lever, an end of said spring connector being moved by saidsecond lever from one side of the pivotof said second lever to the otherside of its pivot, means for swinging the second level-. to shift itsend of the spring, and means for swinging the first lever duringaportion of the swing of the second lever to shift its end of the springto shift the spring from one side of the pivot of the disk to the otherside of the plvot of the disk, whereby the disk is snapped from oneoperative position to the other.

2. A valve construction for fluid motors, comprising a body having a'valve seat, a valve disk in contact with said seat and having spacedparts, a pair of posts onthe body, one post being positioned. to contactalternately with said spaced parts of said ,disk as the disk is moved todetermine the operative limit positions of said disk, the

other of said posts pivotally mounting the other side-of the pivot ofsaid disk, a spring connector between the extending'end of said firstlever and said second lever, an end of said spring connector being movedby said second lever from one side of the pivot of saidsecond lever tothe'other side of its" pivot, a reciprocablemember having a part adaptedto contact with the second lever to swing said second lever, whereby itsend of the spring is shifted, and a part for engaging and moving saidfirst lever during a portion of its movement of the second lever wherebythe end of the spring on the first lever is shifted during a portion ofthe movement of the second lever and the spring is shifted from one sideof theapivot of the disk to the other snapping the disk from oneoperative position to the other. a

3. A valve construction for fluid motors, comprising a body having aseat provided With an exhaust port and a pair of inlet and exhaustports, a valve disk pivoted on said body to move on said seat to andfromtwo operative positions, said valve diskihaving in its facecontacting with said seat a. blind' recess portion adapted in oneoperative positlon to place the exhaust port in communication with oneof the inlet and exhaust ports and in'its other operative position toplacethe exhaust port in 'oommunlcatlon i is with the other inlet andexhaust port, a lever pivoted on said body and having an end engaging aportion of said disk to move it, a second member mounted on said bodyand having a portion movable first to ,one side and then to the otherside of the pivot point of said valve disk, a spring connected to a partof said lever and to said portion of said second member, means formoving said secondvmember and for moving said lever a distance with saidsecond member whereby said spring is shifted from one side to the otherof said pivot point, snapping the disk from one of its operativepositions to the other.

4. A valve construction for fluid motors comprising a body having a rockshaft to be operated journalled therein, said body with its rock shaftbeing removable as a unit from the cylinder of said motor, a seat onsaid body provided with an xhaust port and a pair of inlet and exhaustports, a valve disk pivoted to oscillate on said seat to and from twooperative positions, said disk having in a face contacting with saidseat a recessed portion adapted in one operative position to place theexhaust port in communication with one of the inlet and exhaust portsand in its other operative position to place the exhaust port incommunication with the other inlet and exhaust port,

a lever pivoted on said body and having an end engaging a portion ofsaid disk to move it, a second member fixed to said rock shaft andhaving a portion movable first to one ment of said rock shaft apredetermined distance in one direction to place said disk and saidlever underspring tension tending to moveisaid disk from one operativepor sition to,another when the rock shaft has traveled a predetermineddistance. v

5; A device ofthe class described comprising a tubular body, a. pair ofoppositely disposed spaced pistons movable in said tubularbody,a-pistonrod connecting the pistons for simultaneous movement, fluidconduitsconnected to the opposite ends of said body,

a rock shaft, avrock arm connected ,to the shaft, an operativeconnection between said rock arm and said, piston rod including spacedparts on one of said connected elements and a parton the other of saidconnected elements interposed between said spaced parts, a main suctionline, a valve controllingcommunication between the main suction line andeither of said first-named tons for simultaneous movement,

fluid conduits, a pivoted lever having one end engaged with said valve,a spring connecting the opposite end of said lever with the rock arm,and means movable with the piston rod for eifecting an initial movementof said lever from one limit of movementto a position where the springwill suddenly snap the lever to its opposite limit of movement.

6. Mechanism of the character described, comprising a cylinder, spacedpistons recipe rocal therein, a member connecting the pistons forsimultaneous movement, uid conduits connected to the opposite ends ofthe cylinder, means for alternately applying suction to said conduitsincluding a suction line, a valve for bringing said suction linealternately into communication with said fluid conduits, a lever foractuating said valve, a power-transmitting rockshaft, an. arm fixed tothe shaft and rockable back and forth by the piston-connecting member toopposite sides of the mounting of said lever for oscillating the shaft,resilient means connected at its opposite ends to the lever and arm andhaving its endsmovable to opposite sides of the mounting of said lever,that end of said resilient means which is connected to the arm beingmoved back and forth to opposite sides of the lever mounting by andduring movement of said piston connecting member, and means operable bythe pistonconnecting member to initiate an oscillatory movement of thelever, subsequent to the movement of the arm-attached end of saidresilient means from one side to the opposite, side of the" levermounting, for moving the lever-attached end ofthe resilient means-to aposition from which said resilient means will continue said oscillatorymovement of the lever to effect actuation of said valve.

7. Mechanism of the character described,

comprisinga cylinder, spaced pistons recip- Y the'pisuid conduitsconnected to the opposite ends of the cylinder, means. for alternatelyapplying suction to said conduits including a suction line, a valve forbringing said suction line alternately into communication with saidfluid conduits, a lever having a play connection with the valve foractuatin the valve subsequent toia predetermined idle moverocal therein,a member connectin ,ment of the lever, said piston-connecting memberhaving spaced parts adapted to alternately engage said lever as thepistons approach their opposite limits of travel for initiating eachoscillatory movement of said lever, a rock arm swingable across from oneside to the o posite side ofthe lever mounting-by and dEiring movementof said pistonconnecting member, a spring havin its ends connected tothe lever and to th arm at points spaced from their mountings wherebythe ends of the spring will be moved to opposite sides of the levermounting, said "arm .moving its end of the springlfirst and therebytensioning said spring w erebythe same will act to complete eachoscillatory movement of the lever after the lever movement has beeninitiated by said piston operated member."

8. Mechanism of the'character described,

29 of the lever, said piston-connecting member having spaced partsadapted to engage said lever as the pistons approach their oppositelimits of tr vel for respectively initiating an oscillatory ovement ofsaid lever, said spaced parts acting upon sa d lever during its idlemovement, and means operable by' and during movement of pistons foraccelerating the movement of said lever after it has been started,whereby the operative 30 movement of said lever will be comparative- 1yquick. J v 9. Mechanism ofthecharacter described, comprising a cylinder,spaced pistons reciprocal therein, a member connecting the pistons 3 forsimultaneous movement, fluid conduits connected to the opposite ends ofthe cylinder, means for alternately applying suction to said conduitsincluding a suction line, a valve for bringing said suction linealternately into commnication with said fluid conduits, a lever having aplay connection with the valve for actuating the valve subsequent to apredetermined idle movement of the lever, said piston-connecting memberhaving-spaced parts adapted to engage said lever as the pistons approachtheir opposite'limits of traved for initiating each rocking movement ofsaid lever, said spaced arts acting upon said leverduring its idle mvement, a rock shaft, an arm fixed onthe shaft and rockable by andduringmovement of said piston-connecting member, and a spring connectingthe arm to the lever at points spaced from their mountings and movableto opposite sides thereof by the combined action of said lever and arm.

10. Mechanism of the character described, comprising a cylinder, spacedpistons reciprocal therein, a' member connecting the pistons forsimultaneous movement, a power-transmit ting rock shaft, an arm fixed onthe shaft and os cillatableby said piston-connecting member'forrqckingthe shaft, fluid conduits connected tothe opposite ends of the cylinder,a suction line, a valve operable to connect the suction line alternatelyto the fluid con:

duits, a lever for actuating said valve spaced lugs on thepiston-connecting mem er for engagingthe valve lever as the pistonsapproach their limits of travel to thereby initiate the oscillatorymovements of said valve lever, and a spring connected to the lever andarm and movable under tension by the latter to positions where saidspring will expend its energy in completing the oscillatory moveends ofthe cylinder, a suction line, means for operatively connecting thesuction line alternately to the fluid conduits inbluding a valve, alever for actuating the same, a spring connecting the lever to the rockarm at" points spaced from their respective mountings whereby saidspring will be arranged by sai rock arm to operate the valve lever afterthe movement of the latter has been initiated by a moving part of themechanism, and means. carried by the piston-connecting member forengaging and imparting such initial movement to-the lever as the pistonsapproach each limit of travel whereby said prearranged spring willfunction. p

'12. Mechanism of the character described,

comprising a cylinder, spacedpistons therein,

a member connecting the pistons for. simultaneous movement, and meansfor operatively applying fluidlpressure to the pistons, said meansincluding a valve a lever foractuating the valve, a spring connected atone end to the lever for swinging the same, means movably supporting theopposite end of the spring and operable by said piston-connecting memberfor moving said opposite end of the spring to position said spring inproximity to the pivot of said lever whereby the latter will ,still beheld against movement, and means operable by said piston-connectingmember as the lot pistons approach their respective limits of I movementfer moving said lever a distance suflicient to bring the spring acrossand beyond said lever pivot whereby said spring will quickly move thelever for actuating the valve. l c

13. A.- valve snap action for windshield cleaners comprising a movablymounted valve, a lever having connection therewith, a spring positioningmember movable by a moving part of the windshield cleaner motor,

a spring connecting the positioning member to said lever and movableback-and forth be-,

tweentwo operative. positions at opposite" sides of the fulcrum of saidlever for impart- J30 iiig to the latter a valve shifting movement, andmeans operable from a moving part of the 'motor for positively movingsaid lever subsequent to a prelimlnary positioning of said spring bysaid positioning member to slliipplement such preliminary positioning ine ecting a shift of said spring to the opposite side of the leverfulcrum.

14. A valve snap action for Windshield cleaners comprising a movablymounted valve, a lever having Connection therewith, a spring positioningmember operable by a moving part of the windshield cleaner motor, aspring connecting the positioning member to said lever and movable backand forth between two operative positions at opposite sides of thefulcrum ofsaid lever for imparting to the latter a valve shiftingmovement,

and means operable from a moving part of the motor'for positively movingsaid lever subsequent to a preliminary positioning of said spring bysaid positioning member to supplement such preliminary positioning in Ieffecting a shift of said spring to the opposite side of the leverfulcrum, said means also positively moving said 'valve through saidlever and upon failure of said spring to function when firstshifted tosaid opposite side of said lever fulcrum. a

15. The combination with an automobile windshield frame, of a fluidpressure motor comprising a cylindrical casing closed at both endsandhaving a central opening, a body member inserted in the casingopening and constituting the sole means of support for the casing fromthe windshield frame, the

opposite end portions of the casing being free from said frame, a pistonin the casing, a rock shaft journaled in the body member and 0perable bythe piston, valve mechanism on the body member for operatively admittingfluid pressure to the casing, and means for'operating the valvemechanism by and during movement of the piston.

16. The combination with an automobile windshield frame, of a fluidpressure cleaner motor mounted thereon, said motor comprising a casing,a piston therein, valve mechanism for operatively admitting fluidpressure to the casing, a rock shaft centrally arranged in the casingand operable by the piston, a casing-supporting body member in whichsaid shaft is journaled, saidbody member centrally supporting the casingand constituting'the sole means of support therefor, the opposite endportions of the casing being unattached to the frame, and means forsecuring the body member to the windshield frame.

l7. A fluid pressure motor for windshield cleaners, comprising acylindrical body, a block arranged intermediate the length of the bodyand dividing the latter into a pair of alined cylinders, a pistonoperable in each cylinder, said block having a valve seat on its innerface with ports opening therethrpugh from the cylinders and from asource of operating pressure, a wider operating shaft journaled in saidblock and terminating at its innenend within the cylinder body, saidpistons being operatively connected to said shaft to rock the same, avalve within the cylinder body operating on the valve seat tooperatively connect the ports thereof, and automatic mechanism foroperating the valve, said mechanism including a part directly carriedand operated by said shaft.

18. A fluid pressure motor for windshield cleaners, comprising acylindrical body, a block arranged within the body and dividing the sameinto a pair of spaced cylinders, a piston operable in each cylinder,means operable by the piston across the inner face of said block, saidinner face having a valve seat provided with a pressure supply port andspaced cylinder-ports, a valve operable on the seat to operativelyconnect the pressure supply port alternately to the cylinder ports,means for automatically actuating the valve, and a wiper operating shaftjournaled solely in said block and operably connected by the first meansto said pistons to be rocked thereby.

19. A fluid pIGSSUILG motor for windshield cleaners, comprising acylindrical body, a block arranged within the body and dividing the sameinto a pair of spaced cylinders, a piston operable in each cylinder,means o'perable by the piston across the inner face of said block, a.wiper operating shaft journaled in said block, the latter constitutingthe sole means of support for said shaft, a member fixed on the innerend of the shaft and directly connected to said means to be operatedthereby, said inner face having pressure supply and cylinder ports, andautomatic valve mechanism for operatively connecting the ports, saidmechanism embodying said member.

20. fiuid pressure motor for windshield cleaners, comprising acylindrical body a supporting member for said body engaged with the sameintermediate its ends, pistons operablein the opposite ends of saidbody, a wiper operating shaft journaledin said supporting membertransversely of the body and between the pistons, a member fixed on theshaft within the body, means directly connecting the pistons to saidmember for operating the same, a valve seat ar'rangedon said supportingmember and having a pressure supply port and spaced cylinder ports, a

valve operable on the valve seat, and autostanding ear, closures for thereinoteends of said tube, a central body portion having a portionadapted to be inserted insaid struckout portion of the cylinder anddetachably engaged by said ear,-a rock shaft mounted in fluid inlet andexhaustpassages in said body,

ports from the respective fluid exhaust and fluid inlet and exhaustpassages opening on the inner face of said body, avalve on said body foralternately connecting the fluid exhaust passage port with therespective fluid inlet and exhaust passage ports, a pair of spacedpistons connected-to move together in said tube, a part on said rockshaft adapted to be movedby said pistons hereby said rock 'shaft isoscillated as said pistons rcciprocate, a part connected to said valveand having a portion engaging a part of said pistons whereby said valveis operated from said pistons, said body, rock shaft and-valve:

being insertible and removable from the struck-out portion of said tubeas a single unit, and a pair of removable fluid inlet and exhaust tubesextending from said inlet and exhaust passages in said body to theendsof said tube. i

22. In a fluid pressure motor, the combina tion with an automobilewindshield frame, of a body portion adapted to engage said frame andhaving parts for securement of said body portion to said frame, acylinder having 'a recessed or cut out portion to receive a part of saidbody portion whereby said cylinder is maintained by said body portion onsaid frame, a rock shaft mounted in a bearing in said \body portion andprojecting from said bod portion beyond said'cylinder, a portion of saidrock shaft being positioned'in said cylinder, means for securing saidcylinder on said body portion whereby said cylinder is supported on saidwindshield frame by said body portion, a valve'and valve mecha nismmounted on said body portion in said cylinder, a piston in saidcylinder, and operable connections between said piston and said rockshaft and said piston and said valve mechanism whereby said rock shaftand said valve'me'chanism are operated by the movement of said piston,said body portion, rock shaft and valve and valve mechanism being,

removable as a single unit from said cylin p der. i

23 A fluid pressure motor comprising a cylinder, a piston constructionin said cylinder, a piston rod connected to said piston construction andhavingan angularly extend ing part, an oscillatory rod operablyconnectedto said part and adapted to be connected to a windshield cleaner, abearing in which said oscillatory rod is mounted, said oscillatoryrodand bearing being in a valve block detachably mounted in saidcylinder,

inder, each of said separate tubes bearing able from said tube as asingle-unit.

and valve mechanism in said valve block for alternatelyexhausting-fluid/from the ends of'said cylinder for moving said pistonconstruction in said cylinder.

24 In a fluid pressure motor .for 7 windshield cleaners, a tube having acentrally arranged opening and forming a pair of alined cylinderportions, end pieces on said tube closing the ends thereof, a pairofspaced pistons in said tube, one piston being in each 7 of said cylinderportions, a connecting member between said spaced pistons, a body memberinsertible in and removable from said tube opening and centrallydisposed between said cylinder portions and connected to said tube, saidbody member extending into said tube so that the latter will overlie theformer and be directly supported thereby, fluid passages in said bodymember, a pair of separate tubes extending lengthwise of said cylat oneend ii i one. of said cylinder portions and atthe other end in saidcentral bodymembcr for admitting fluid to or exhausting fluid from theends of said cylinder portions, said connecting member having a partextending angularly relative to the path of 0peration of said connectingmember, a rock shaft having a laterally extending part operably engagingsaid connecting member '5 part,said body member having a bearing inWhich said rock shaft is mounted, said body being dctachably mounted insaid cylinder,) and valve mechanism in said body for admitting orexhausting fluid said tubes 25. In a fluid pressure motor, thecombination with'an automobile windshield frame inember, of a tubeproviding a-pair of cylinder portions, a central valve supporting blockm 5 insert-ible in and removable from said tube, a rock, sliaft mountedin said valveblock, a motion transmitting member mounted on said rockshaft-to move said shaft, a pair of spaced pistons in said cylinders,operating connec- 1m tions between said pistons and said motiontransmitting member, a valve on said valve supporting block in said tubefor controlling .the admission of fluid to said cylinder por- 'tainingsaid rock shaft in operative position with'respect to said windshield,frame, said valve block, rock shaft and motion transmit ting memberbeing iusertible in and remov- 26/111 a fluid pressure motor, a metaltube providing a pair of alined cylinder portions, a pair of spacedpistons in said cylinder'pon tions, a block centrally disposed betweensaid cylinder portions, and carrying a valve and 13a pressure throughshield frame by said central body, a pair of valve actuating mechanism,a member (ion-' nectmg the piston, parts of sald valve actuatingmechanism extending bet-ween said pis- '=tons to be operated by themovement thereof,

a power transmission arm arranged to be operated by said pistonconnecting member, a rock shaft operably connected to said arm andadapted to carry windshield wiper said rock shaft being carried by saidblock,

extending transversely to the axis of said piston and adapted to move amember to be operated by s id motor, a part on said rock shaft extendininto the path of travel of said piston, a part on said piston adapted toengage said rock shaft part to swing said roclz shaft, a central bodyhaving a portion insertible in a recess in said cylinder and providing abearing for said rock shaft, said body portion having a part adapted toen gage a windshield frame, means for securing said body rigidly to saidwindshield frame whereby said rock shaft is maintained in operativeposition with respect to said windshield frame, and means detacliablysecuring said cylinder to said central body whereby said cylinder issupported adjacent the windspaced projections on an inner wall of saidcylinder, a rigid part on said piston moitable between and engaging saidspaced projections, whereby said piston is prevented from turning insaid tube and said first piston part is maintained alined with said rockshaft, and means for admitting fluid pressure to said cylinder forcausing said piston to reciprocate in said tube.

28. In a fluid pressure motor, a sheet metal tube constituting a pair ofcylinders, a pair of spaced pistons in said cylinders and reciprocabletherein, a sheet metal spacer member connecting said pistons andreciprocable therewith, said tube having on its inner wall a pair ofprojecting guide parts struck inwardlytherefrom upon opposite sides of aportion of said spacer to guide the latter *lengthwise whereby saidpistons are prevented from rotating in said tube, and means for causingsaid pistons to reciprocate in said tube.

29. In a fluid pressure motor,a metal tube constituting a pair ofcylinder portions and having a recess therein, a pair of spaced pi'stons in said cylinder portions and reciprocabld therein, a sheet metalspacer member connecting said pistons and reciprocabletherewith, a pairof integral spaced lugs on the inner walls of said tube struck out fromthe metal of said tube, a portion of said spacer being movable betweensaid.lugs, whereby said spacer and pistons are prevented from turning insaid tube, a central supporting member having means for rigid securementto a windshield frame of an automobile and having a part projecting intothe recess in said metal tube, means connecting said metal tube adjacentsaid recess to said central meniber whereby said tube is supportedadjacent the windshield by said central member and is prevented fromturning with respectthcreto, fluid controlling valve and valvemechanisms on said central member in said tube, an operating shaft for awindshield wiper carried in bearings in said central member and beingpositioned by said central member with respect to the windshield frameand having a part projecting into said tube for operative connectionwith said pistons, and struck out parts on said spacer for operatingsaid valve mechanism.

In testimony whereof I affix my signature.

ALVAH L. JUST.

CERTIFICATE or coanacrron.

PafliihtrNM-l-l,777,799. Granted October 1, 1930, m

'ALVAH L. wsr.

It is hereby certified that error appears in the printed specificationof the above numbered. patent requiring correction as follows: Page 5,line 40, claim 9, for the misspelled word "commnication" readcommunication, and line 46, same claim, for "-traved" read travel; page6, line 68, claim 17, for "wider" read wiper; and that the said LettersPatent should be read with these corrections therein that the same mayconform to the record of the case in the Patent Office.

Signed and sealed this 9th day of December, A. D. 1930.

I r M. J. Moore, (Seal) Acting Commissioner of Patents.

